Tamtam Start free

Energy companies headquartered in San Diego

Tamtam tracks 27 energy companies headquartered in San Diego. This list ranks all of them by number of employees on LinkedIn, led by General Atomics, Solar Turbines and San Diego Gas & Electric. Their median headcount is 97. Half of them were founded in 2006 or later.

馃嚭馃嚫 San Diego27 companiesUpdated Nov 2, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
General Atomicsga.com

Development of advanced technology solutions including unmanned aerial vehicles, research reactors, aircraft systems, MagLev transport, and fusion energy for global customers.

Defense and Space Manufacturing 馃嚭馃嚫 San Diego 11,213 n/a
2
Solar Turbinessolarturbines.com

Manufacturer of industrial gas turbines, compressors, and generator sets used in oil, gas, and power generation projects globally.

Oil and Gas 馃嚭馃嚫 San Diego 7,656 1927
3
San Diego Gas & Electricsdge.com

provides clean, safe, and reliable energy to improve lives in San Diego and southern Orange counties with over 4,000 employees

Utilities 馃嚭馃嚫 San Diego 2,822 1881
4
Semprasempra.com

A leading energy infrastructure company helping to electrify and decarbonize major markets in North America through sustainable practices and operational excellence

Utilities 馃嚭馃嚫 San Diego 2,572 n/a
5
SOLV Energysolvenergy.com

Provider of solar services for utility, high-voltage substation, and energy storage markets in North America Focus on cleaner power and renewable energy initiatives

Services for Renewable Energy 馃嚭馃嚫 San Diego 1,772 2008
6
EDF Renewables North Americaedf-re.com

Development and operation of wind, solar, and storage projects with onsite energy solutions for commercial and industrial customers.

Renewable Energy Power Generation 馃嚭馃嚫 San Diego 1,725 1987
7
Powur, PBCpowur.com

Empowering homeowners and advisors to thrive in the global shift to sustainable energy, accelerating the adoption of clean energy worldwide

Renewables & Environment 馃嚭馃嚫 San Diego 1,078 2014
8
Sempra Infrastructuresemprainfrastructure.com

The company delivers energy in North America, committed to building future energy systems for a better world

Oil and Gas 馃嚭馃嚫 San Diego 968 n/a
9
Greentech Renewablesgreentechrenewables.com

A leading solar equipment distributor offering a wide range of solar and electrical products, with a focus on providing excellent service and support

Services for Renewable Energy 馃嚭馃嚫 San Diego 626 n/a
10
iTECHitecheng.com

Designs, engineers, and manufactures batteries, chargers, and docking stations for medical, handheld electronics, security, and mobile communication markets, focusing on intrinsically safe and smart power.

Appliances, Electrical, and Electronics Manufacturing 馃嚭馃嚫 San Diego 580 1997
11
Calpine Energy Solutions, LLCcalpinesolutions.com

US retail energy business helping commercial and industrial businesses manage energy costs in deregulated markets with integrated products and services

Business Consulting and Services 馃嚭馃嚫 San Diego 461 2001
12
PowerFlexpowerflex.com

A clean technology solutions company enabling transition to carbon-free energy through solar, storage, EV charging, and energy management platform

Services for Renewable Energy 馃嚭馃嚫 San Diego 250 n/a
13
Royale Energy, Inc.royl.com

An independent exploration and production company founded in 1986, focused on acquiring, developing, and marketing oil and natural gas in various basins

Oil and Gas 馃嚭馃嚫 San Diego 121 1986
14
Beam Globalbeamforall.com

Clean technology innovator specializing in sustainable infrastructure products, EV charging solutions, energy storage, and energy security to power transportation and protect the environment

Renewable Energy Equipment Manufacturing 馃嚭馃嚫 San Diego 97 2006
15
Nikkiso America, Inc.nikkisoamerica.com

The company provides innovative technologies and products globally, focusing on aerospace, industrial, medical, and precision equipment divisions to meet customer demands

Industrial Machinery Manufacturing 馃嚭馃嚫 San Diego 65 2006
16
Sempra Renewablessemprarenewables.com

A leading developer of clean energy solutions, with nearly 2,600 MW of renewable generating capacity fuelled by sun and wind across 11 states

Renewable Energy Semiconductor Manufacturing 馃嚭馃嚫 San Diego 41 n/a
17
Nuvve Holding Corp.nuvve.com

Leading planet electrification through intelligent energy platform, combining vehicle-to-grid technology and electrification partners to manage power among EV batteries and grid.

Renewables & Environment 馃嚭馃嚫 San Diego 39 2010
18
Adroit Energy, Inc.adroitenergy.com

A leading renewable energy engineering and construction firm specializing in solar thermal systems, solar photovoltaic, energy storage, geothermal, and green technologies

Renewable Energy Semiconductor Manufacturing 馃嚭馃嚫 San Diego 10 1986
19
CM Solar Electric inccmsolarelectric.com

Family-owned electrical organization in San Diego, offering Sustainable Power Solutions for SDG&E consumers with contracting, design, installation, and maintenance services Vision: net zero energy California

Renewable Energy Semiconductor Manufacturing 馃嚭馃嚫 San Diego 8 1999
20
SALKA ENERGYsalkaenergy.com

Innovative renewables developer and IPP based in San Diego, specializing in overcoming challenges in financing and developing renewable energy projects

Renewable Energy Power Generation 馃嚭馃嚫 San Diego 7 2013
21
Phoenix Power Renewables

Dedicated team specializing in renewable energy solutions for a sustainable future

Renewable Energy Power Generation 馃嚭馃嚫 San Diego 6 n/a
22
Astra Energy Inc.astraenergyinc.com

Integrated solutions provider in project development and renewable energy technology, focusing on securing assets, identifying market opportunities, and executing high-demand projects

Renewable Energy Semiconductor Manufacturing 馃嚭馃嚫 San Diego 5 n/a
23
Blue Planet Energy Solutionsblueplanetes.com

An energy service company providing a range of energy solutions, including design, implementation, retrofitting, energy conservation, power generation, and energy-efficient equipment installation

Facilities Services 馃嚭馃嚫 San Diego 4 2010
24
Pacific Coast Powerpacificcoastpower.com

The company provides clean energy solutions to create communities that meet growing energy demands, focusing on underserved solar customers

Solar Electric Power Generation 馃嚭馃嚫 San Diego 4 n/a
25
Terra Steward Energy Groupterrasteward.com

Fully integrated renewable energy company focused on energy-efficient solutions for commercial, industrial, and residential customers, leading the way in solar, energy storage, and EV/ES solutions

Environmental Services 馃嚭馃嚫 San Diego 3 2010
26
Breakwave Energybreakwave.energy

This company specializes in providing innovative solutions to meet future energy demands, focusing on sustainability and efficiency

Renewable Energy Power Generation 馃嚭馃嚫 San Diego 2 2018
27
Sempra U.S. Gas & Power, LLCsemprausgp.com

Collaborating with partners and communities to develop innovative clean energy solutions for future challenges

Utilities 馃嚭馃嚫 San Diego 2 n/a

Turn this list into pipeline

Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.

Build your own list, free

How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 2, 2026.

More company lists in San Diego

The same list elsewhere in United States